Double-layer crop germplasm resource library

Abstract

The invention discloses a double-layer crop germplasm resource library, which comprises a library body, a germplasm preservation area is arranged in the library body, the germplasm preservation area comprises a low-temperature refrigeration house, a low-temperature dehumidification equipment machine room is arranged on one side of the low-temperature refrigeration house, the low-temperature refrigeration house comprises a long-term refrigeration house, a middle-term refrigeration house and a short-term refrigeration house, and the low-temperature refrigeration house comprises a low-temperature refrigeration house inner layer and a low-temperature refrigeration house outer layer. The low-temperature refrigeration house inner layer and the low-temperature refrigeration house outer layer form a double-layer assembly type house body structure, the low-temperature refrigeration house inner layer adopts a double-sided stainless steel polyurethane insulation board, the low-temperature refrigeration house outer layer adopts a double-sided color steel rock wool insulation board, and the two layers of insulation boards are connected through ceramic bolts. The device is convenient to install, has good fireproof, heat-insulating, waterproof and moisture-proof performance, keeps the constant-temperature and constant-humidity environment in the refrigeration house, is remarkable in energy-saving effect, ensures that the high vitality level and genetic integrity of crop germplasm resources are maintained in the storage process, and meets the requirement for safe storage of the crop germplasm resources.

Description

Technical Field

[0001] The present invention relates to the technical field of germplasm resource protection, and in particular to a double-layer crop germplasm resource bank. Background Art

[0002] There are various structures of crop germplasm resource banks in the prior art, and the common problems are: the existing technology's library structure has many deficiencies in terms of heat preservation, moisture insulation and fire prevention, which makes the crop germplasm resources susceptible to changes in temperature and humidity in the external environment during the storage process, thereby affecting their vitality and genetic integrity. In particular, most crop germplasm resource banks do not have low-temperature germplasm long-term libraries, which is not conducive to the long-term and safe preservation of some famous, special and high-quality crop germplasm resources. Summary of the invention

[0003] The present invention is to overcome the shortcomings of the above-mentioned prior art and provide a double-layer crop germplasm resource bank. The low-temperature cold storage of the present invention includes a low-temperature cold storage inner layer and a low-temperature cold storage outer layer. The connected low-temperature cold storage inner layer and the low-temperature cold storage outer layer constitute a double-layer assembled storage structure, wherein the low-temperature cold storage inner layer adopts a double-sided stainless steel polyurethane insulation board, and the low-temperature cold storage outer layer adopts a double-sided color steel rock wool insulation board. The storage structure has good fire prevention, heat insulation, waterproof and moisture-proof properties, good strength and durability; it can reduce indoor and outdoor heat transfer and achieve energy conservation and emission reduction goals; it can effectively block water vapor penetration and maintain a low temperature and low humidity environment inside the cold storage. Compared with a single-layer storage body, under the same environment and use conditions, the energy-saving effect is significant, ensuring that the crop germplasm resources maintain their high vitality level and genetic integrity during the storage process, and meeting the safe storage needs of crop germplasm resources.

[0004] The technical solution adopted by the present invention to solve the technical problem is:

[0005] A double-layer crop germplasm resource bank includes a bank body, a civil wall on the outside of the bank body, a plurality of wall doors on the civil wall, a bank body insulation door, and a germplasm preservation area in the bank body. The germplasm preservation area includes a low-temperature cold storage, a low-temperature dehumidification equipment room is provided on one side of the low-temperature cold storage, the low-temperature cold storage includes a long-term warehouse, a medium-term warehouse, and a short-term warehouse, and the long-term warehouse, the medium-term warehouse, and the short-term warehouse are all provided with cold storage insulation doors. The low-temperature cold storage includes a low-temperature cold storage inner layer and a low-temperature cold storage outer layer. The connected low-temperature cold storage inner layer and the low-temperature cold storage outer layer constitute a double-layer assembled bank body structure, wherein the low-temperature cold storage inner layer adopts a double-sided stainless steel polyurethane insulation board, and the low-temperature cold storage outer layer adopts a double-sided color steel rock wool insulation board. During construction, the rock wool insulation board and the polyurethane insulation board are assembled at the same time, and the two insulation boards are connected by ceramic bolts.

[0006] A gap is arranged between the outer layer of the low-temperature cold storage and the civil construction wall, a C-shaped steel ring beam is arranged between the gap, and the outer layer of the low-temperature cold storage is connected to the civil construction wall through the C-shaped steel ring beam.

[0007] The lower part of the C-shaped steel ring beam is provided with a connected external expansion fixed angle steel frame, the end face of the C-shaped steel ring beam is connected to one end face of the external expansion fixed angle steel frame, and the other end face of the external expansion fixed angle steel frame is connected to the civil wall.

[0008] The low-temperature cold storage is a rectangular structure, and the long-term storage, medium-term storage and short-term storage are respectively provided with multiple rooms; the long-term storage is located in the middle of one of the long sides of the rectangle of the low-temperature cold storage, and the short-term storage is arranged close to both sides of the long-term storage; the medium-term storage is located on the other long side of the rectangle of the low-temperature cold storage, and a buffer aisle is provided between the long-term storage and the medium-term storage.

[0009] A storage and retrieval operation room is provided in the low-temperature cold storage near the medium-term storage; an antechamber is provided in the storage and retrieval operation room near the medium-term storage, and a pre-cooling cabinet and an anti-condensation cabinet are provided against the wall of the storage and retrieval operation room.

[0010] There is a power distribution room and a tool room on one side of the low-temperature cold storage.

[0011] The top, bottom and circumference between the inner layer of the low-temperature cold storage and the outer layer of the low-temperature cold storage are sealed on site with flame-retardant PU material to block the hot and humid air from the outside.

[0012] The cold storage insulation door and the storage body insulation door are double-sided color steel polyurethane insulation doors;

[0013] The entrances of the cold storage insulation door and the storage body insulation door adopt an insulation profile edge treatment structure to prevent the formation of cold bridges.

[0014] Aluminum alloy gusset plate ceiling is adopted in the warehouse; thermal insulation board is provided on the floor of the warehouse, the thermal insulation board is laid with staggered seams, a moisture-proof layer is provided on the thermal insulation board, and the thermal insulation board adopts XPS extruded board with good flame retardant grade, low thermal conductivity and low water absorption.

[0015] The beneficial effects of the present invention are:

[0016] 1. The germplasm preservation area of ​​the double-layer crop germplasm resource bank of the present invention includes: a low-temperature cold storage, a low-temperature dehumidification equipment room is provided on one side of the low-temperature cold storage, the low-temperature cold storage includes a long-term storage, a medium-term storage, and a short-term storage, and the long-term storage, the medium-term storage, and the short-term storage are all provided with cold storage insulation doors, the low-temperature cold storage includes a low-temperature cold storage inner layer, a low-temperature cold storage outer layer, and a double-layer assembled storage structure formed by connecting the two, which is easy to install and efficient, wherein the inner layer of the low-temperature cold storage adopts a double-sided stainless steel polyurethane insulation board, and the outer layer of the low-temperature cold storage adopts a double-sided color steel rock wool insulation board. The storage structure has good fire prevention, heat insulation, and waterproof and moisture-proof properties, good strength and durability; it can reduce indoor and outdoor heat transfer and achieve energy saving and emission reduction goals; it can effectively block water vapor penetration and maintain a low temperature and low humidity environment inside the cold storage. The double-layer storage body has a good thermal insulation effect, which can solve the problem of meeting fire protection requirements and achieving good thermal insulation effects. Compared with the single-layer storage body, under the same environment and use conditions, the energy-saving effect is significant.

[0017] 2. Polyurethane materials have good thermal insulation effects, color steel plates are easy to process and shape, and have low costs. Double-sided color steel rock wool materials have good flame retardant effects, good thermal insulation and fire resistance, good durability, and low maintenance costs.

[0018] 3. The double-layer assembled warehouse structure takes into account both the thermal insulation effect and the A-level flame retardancy, achieving both compliance with fire protection requirements and good thermal insulation effect. At the same time, it is easy to install and disassemble, the main materials can be reused, and the maintenance cost is low.

[0019] 4. During construction, rock wool insulation boards and polyurethane insulation boards are installed at the same time. The two layers of insulation boards are connected by ceramic bolts to ensure the accuracy and stability of the overall installation.

[0020] 5. The top, bottom and circumference between the inner layer of the low-temperature cold storage and the outer layer of the low-temperature cold storage are sealed on site with flame-retardant PU material to block the hot and humid air from the outside.

[0021] 6. The insulation door and the warehouse insulation door adopt double-sided color steel polyurethane insulation door; the entrance of the insulation door and the warehouse insulation door adopts the insulation profile edge treatment structure to prevent the formation of cold bridges, which has good insulation effect and significant energy saving and consumption reduction effect.

[0022] 7. Aluminum alloy gusset plate ceiling is used in the warehouse; the floor of the warehouse is equipped with thermal insulation boards, which are laid with staggered seams and have moisture-proof layers on them. The thermal insulation boards are made of XPS extruded boards with good flame retardancy, low thermal conductivity and low water absorption, which can reliably realize moisture-proof and heat preservation of the warehouse.

[0023] 8. The long-term storage of the present invention adopts intelligent storage and retrieval cabinets to store bottled germplasm resources for long-term preservation of crop germplasm resources; the seeds stored in the storage must undergo acceptance registration, cleaning, health testing, vitality testing, drying and packaging, storage positioning and other operations, and meet the storage standards.

[0024] The medium-term bank is used for the collection, cataloguing, medium-term preservation, identification, evaluation, distribution, exchange, reproduction and renewal, and compilation of germplasm information of a certain type of crop germplasm resources. The germplasm preserved in the medium-term bank needs to undergo pre-processing operations, including vitality testing, moisture content determination, drying and packaging, etc.

[0025] Short-term banks are used for the short-term or temporary storage of newly collected germplasm resources awaiting identification and evaluation, or for the preservation of germplasm materials collected by breeders for crop improvement research.

[0026] 9. The antechamber is used for pre-cooling germplasm resources to be stored and for resuscitation of germplasm resources to be stored. It can reduce the internal temperature unevenness and water vapor condensation caused by sudden drop and rise in temperature during the storage and outbound process of germplasm resources. The antechamber can be used for crop germplasm resources to enter and leave long-term, medium-term and short-term storages.

[0027] 10. The low-temperature dehumidification equipment room adopts a structure that is closed to the outside environment. The low-temperature dehumidification equipment room that adopts a structure that is closed to the outside environment is not easy to get dust, so the low-temperature dehumidification equipment room is clean. The low-temperature dehumidification equipment room is equipped with a low-temperature dehumidification equipment outdoor unit. The low-temperature dehumidification equipment outdoor unit uses multiple condensing units to exhaust air through centralized air ducts. The low-temperature dehumidification equipment outdoor unit is connected to the automatic induction control system for supply and exhaust air.

[0028] 11. There is a storage and retrieval operation room in the low-temperature cold storage near the medium-term storage. The beneficial effect is that it is used for seed storage and retrieval operations and automatic control console storage, and it is also convenient for visits and popular science publicity.

[0029] 12. Precooling cabinets and anti-condensation cabinets are respectively provided near the wall of the storage and retrieval operation room 9. The beneficial effect is that the precooling cabinet has the function of preventing sudden cooling of seeds when entering the warehouse, so as to avoid the phenomenon of moisture absorption of seeds due to low temperature; the anti-condensation cabinet has the function of gradient heating, so as to avoid the phenomenon of significant condensation of water on the surface of the germplasm bottle when the seeds leave the warehouse.

[0030] 13. By setting up a power distribution room and a tool room in the low-temperature cold storage, it is convenient for use and maintenance to ensure the safe and reliable operation of the germplasm resource bank.

[0031] 14. A gap is provided between the outer layer of the low-temperature cold storage and the civil wall, and a C-shaped steel ring beam is provided between the gaps, and the outer layer of the low-temperature cold storage is connected to the civil wall through the C-shaped steel ring beam. The beneficial effect is that the horizontal and vertical degree of the wall can be well ensured, and the structural strength and sealing between the insulation board and the insulation board, and the insulation board and the fireproof board can be strengthened, thereby ensuring the insulation performance of the double-layer crop germplasm resource bank and increasing the service life.

[0032] 15. The lower part of the C-shaped steel ring beam is provided with a connected external expansion fixed angle steel frame, the end face of the C-shaped steel ring beam is connected to one end face of the external expansion fixed angle steel frame, and the other end face of the external expansion fixed angle steel frame is connected to the civil wall. The beneficial effect is to ensure the horizontality and verticality of the C-shaped steel ring beam, prevent the C-shaped steel from bending due to excessive length, and make it take root on the civil wall through the external expansion fixed angle steel, so as to ensure the firmness of the ring beam structure and indirectly ensure the overall structural strength of the double-layer crop germplasm resource bank.

[0033] 16. The low temperature cold storage is a rectangular structure, and the long-term storage, medium-term storage, and short-term storage are respectively provided with multiple rooms; the long-term storage is located in the middle of one of the long sides of the low temperature cold storage rectangle, and the short-term storage is set near both sides of the long-term storage; the medium-term storage is located on the other long side of the low temperature cold storage rectangle, and a buffer aisle is provided between the long-term storage and the medium-term storage. The compact structure facilitates the access and placement of crop germplasm resources, improves storage and access efficiency, and reduces storage and access time. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0035] Figure 1 It is a schematic diagram of the structure of an embodiment of the present invention;

[0036] Figure 2 It is a schematic diagram of the connection structure between the inner layer of the low-temperature cold storage, the outer layer of the low-temperature cold storage and the civil wall 16.

[0037] In the figure, warehouse body 1, cold storage insulation door 2, long-term warehouse 3, medium-term warehouse 4, short-term warehouse 5, low-temperature cold storage inner layer 6, low-temperature cold storage outer layer 7, buffer aisle 8, storage and retrieval operation room 9, front room 10, low-temperature dehumidification equipment room 11, tool room 12, ceramic bolts 13, C-shaped steel ring beam 14, angle steel frame 15, civil wall 16, pre-cooling cabinet 17, wall door 18, gap 19, warehouse body insulation door 20, anti-condensation cabinet 21, and distribution room 22. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0039] In the description of the present invention, the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the purpose of describing the present invention rather than requiring the present invention to be constructed or operated in a specific position, and therefore should not be construed as limiting the present invention. The terms "connected" and "connected" in the present invention should be understood in a broad sense, for example, it can be a connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate component. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0040] like Figure 1 , Figure 2 As shown, a double-layer crop germplasm resource bank includes a bank body 1, the outer side of the bank body 1 is a civil wall 16, the civil wall 16 is provided with a plurality of wall doors 18, the bank body is provided with a bank body insulation door 20, and the bank body is provided with a germplasm preservation area, the germplasm preservation area includes: a low-temperature cold storage, a low-temperature dehumidification equipment room 11 is provided on one side of the low-temperature cold storage, the low-temperature cold storage includes a long-term warehouse 3, a medium-term warehouse 4, and a short-term warehouse 5, the short-term warehouse 5 or an adjustable warehouse, the long-term warehouse 3, the medium-term warehouse 4, and the short-term warehouse 5 are all provided with a cold storage insulation door 2, the low-temperature cold storage includes a low-temperature cold storage inner layer 6 and a low-temperature cold storage outer layer 7, the connected low-temperature cold storage inner layer 6 and the low-temperature cold storage outer layer 7 constitute a double-layer assembled bank body structure, wherein the low-temperature cold storage inner layer 6 adopts a double-sided stainless steel polyurethane insulation board, and the low-temperature cold storage outer layer 7 adopts a double-sided color steel rock wool insulation board. During construction, the rock wool insulation board and the polyurethane insulation board are installed at the same time, and the two layers of insulation boards are connected by ceramic bolts 13 to ensure the accuracy and stability of the overall installation.

[0041] Long-term warehouses use intelligent storage and retrieval cabinets to store bottled germplasm resources for the long-term preservation of crop germplasm resources. The seeds stored in the warehouse must undergo acceptance registration, cleaning, health testing, vitality testing, drying and packaging, storage positioning and other operations, and must meet the storage standards.

[0042] The medium-term bank is used for the collection, cataloguing, medium-term preservation, identification, evaluation, distribution, exchange, reproduction and renewal, and compilation of germplasm information of a certain type of crop germplasm resources. The germplasm preserved in the medium-term bank needs to undergo pre-processing operations, including vitality testing, moisture content determination, drying and packaging, etc.

[0043] Short-term banks are used for the short-term or temporary storage of newly collected germplasm resources awaiting identification and evaluation, or for the preservation of germplasm materials collected by breeders for crop improvement research.

[0044] The antechamber is used for precooling germplasm resources to be stored and for resuscitation of germplasm resources to be stored, so as to reduce the internal temperature unevenness and water vapor condensation caused by the sudden drop and rise in temperature during the storage and outbound process of germplasm resources; this equipment can be used for crop germplasm resources entering and leaving long-term storage, medium-term storage and short-term storage.

[0045] A gap 19 is provided between the outer layer 7 of the low-temperature cold storage and the civil wall 16 , and a C-shaped steel ring beam 14 is provided between the gaps, through which the outer layer 7 of the low-temperature cold storage is connected to the civil wall 16 .

[0046] The lower part of the C-shaped steel ring beam 14 is provided with an external expansion fixed angle steel frame 15 connected thereto. The end face of the C-shaped steel ring beam 14 is connected to one end face of the angle steel frame 15 , and the other end face of the angle steel frame 15 is connected to the civil wall 16 .

[0047] Double-sided stainless steel polyurethane insulation board has good fire prevention and heat insulation performance, waterproof and moisture-proof performance, good strength and durability, effectively prevents and reduces indoor and outdoor heat transfer, achieves energy conservation and emission reduction goals, can effectively block water vapor penetration, and maintain a constant temperature environment inside the cold storage.

[0048] Polyurethane materials have good thermal insulation effects, color-coated steel plates are easy to process and shape, and have low costs. Double-sided color-coated steel rock wool materials have good flame retardant effects, good thermal insulation and fire resistance, good durability, and low maintenance costs.

[0049] The double-layer prefabricated warehouse structure takes into account both thermal insulation effect and Class A flame retardancy, achieving both compliance with fire protection requirements and good thermal insulation effect. At the same time, it is easy to install and disassemble, the main materials can be reused, and the maintenance cost is low.

[0050] The low-temperature cold storage is a rectangular parallelepiped structure, and the long-term storage 3, the medium-term storage 4, and the short-term storage 5 are respectively provided with multiple rooms. The long-term storage 3 is arranged in the middle of one of the long sides of the low-temperature cold storage rectangle, and the short-term storage 5 is arranged near both sides of the long-term storage; the medium-term storage 4 is arranged on one side of the other long side of the low-temperature cold storage rectangle, and a buffer passage 8 is arranged between the long-term storage 3 and the medium-term storage 4.

[0051] A storage and retrieval operation room 9 is provided in the low-temperature cold storage near the medium-term storage.

[0052] An antechamber 10 is provided in the storage and retrieval operation room 9 near the mid-term warehouse.

[0053] A pre-cooling cabinet 17 and an anti-condensation cabinet 21 are respectively provided against the wall of the storage and retrieval operation room 9 .

[0054] A power distribution room 22 and a tool room 12 are provided in the low-temperature cold storage.

[0055] The top, bottom and circumference between the low-temperature cold storage inner layer 6 and the low-temperature cold storage outer layer 7 are sealed on site with flame-retardant PU material to block external hot and humid air.

[0056] The cold storage insulation door 2 adopts a high-quality double-sided color steel polyurethane insulation door.

[0057] The entrances of the cold storage insulation door 2 and the storage body insulation door 20 are treated with heat-insulating profiles to prevent the formation of cold bridges.

[0058] The warehouse ceiling is made of aluminum alloy ceiling panels, which are beautiful and can ensure the temperature and humidity in the warehouse.

[0059] The floor of the warehouse is provided with a heat-insulating board, and a moisture-proof layer is provided on the heat-insulating board. The heat-insulating board is made of XPS extruded board, which is laid with staggered seams. The flame retardant grade of XPS is ≥ B1, and the thermal conductivity coefficient (standard conditions) is

[0060] λ≤0.030W·m -1 ·K -1 , water absorption rate ≤1.0%.

[0061] The double-layer warehouse has good thermal insulation effect, which can solve the problem of meeting fire protection requirements and achieving good thermal insulation effect. Compared with the single-layer warehouse, it can save more than 10% of energy consumption under the same environment and use conditions.

[0062] The low-temperature dehumidification equipment room adopts a structure that is closed to the outside environment. The low-temperature dehumidification equipment room that adopts a structure that is closed to the outside environment is not easy to get dust, so the low-temperature dehumidification equipment room is clean. The low-temperature dehumidification equipment room is equipped with a low-temperature dehumidification equipment outdoor unit. The low-temperature dehumidification equipment outdoor unit uses multiple condensing units to exhaust air in a centralized air duct. The low-temperature dehumidification equipment outdoor unit is connected to the automatic induction control system for supply and exhaust air.

[0063] The above is a preferred embodiment of the present invention, and the description of the specific embodiment is only used to better understand the concept of the present invention. For those skilled in the art, several improvements or equivalent replacements can be made according to the principles of the present invention, and these improvements or equivalent replacements are also considered to fall within the protection scope of the present invention.

Claims

1. A double-layer crop germplasm resource bank, comprising a bank body, a civil wall on the outside of the bank body, a plurality of wall doors on the civil wall, a bank body insulation door in the bank body, and a germplasm storage area in the bank body, characterized in that: The germplasm preservation area includes: a low-temperature cold storage, on one side of which a low-temperature dehumidification equipment room is arranged, the low-temperature cold storage includes a long-term storage, a medium-term storage and a short-term storage, and the long-term storage, the medium-term storage and the short-term storage are all provided with cold storage insulation doors, the low-temperature cold storage includes a low-temperature cold storage inner layer and a low-temperature cold storage outer layer, the connected low-temperature cold storage inner layer and the low-temperature cold storage outer layer constitute a double-layer assembled warehouse structure, wherein the inner layer of the low-temperature cold storage adopts double-sided stainless steel polyurethane insulation board, and the outer layer of the low-temperature cold storage adopts double-sided color steel rock wool insulation board; during construction, the rock wool insulation board and the polyurethane insulation board are installed at the same time, and the two layers of insulation boards are connected by ceramic bolts.

2. A double-layer crop germplasm resource bank according to claim 1, characterized in that: A gap is arranged between the outer layer of the low-temperature cold storage and the civil construction wall, a C-shaped steel ring beam is arranged between the gap, and the outer layer of the low-temperature cold storage is connected to the civil construction wall through the C-shaped steel ring beam.

3. A double-layer crop germplasm resource bank according to claim 2, characterized in that: The lower part of the C-shaped steel ring beam is provided with a connected external expansion fixed angle steel frame, the end face of the C-shaped steel ring beam is connected to one end face of the external expansion fixed angle steel frame, and the other end face of the external expansion fixed angle steel frame is connected to the civil wall.

4. A double-layer crop germplasm resource bank according to claim 1, characterized in that: The low-temperature cold storage is a rectangular structure, and the long-term storage, medium-term storage and short-term storage are respectively provided with multiple rooms; the long-term storage is located in the middle of one of the long sides of the rectangle of the low-temperature cold storage, and the short-term storage is arranged close to both sides of the long-term storage; the medium-term storage is located on the other long side of the rectangle of the low-temperature cold storage, and a buffer aisle is provided between the long-term storage and the medium-term storage.

5. A double-layer crop germplasm resource bank according to claim 1, characterized in that: There is a storage and retrieval operation room in the low-temperature cold storage near the medium-term storage.

6. A double-layer crop germplasm resource bank according to claim 5, characterized in that: There is an antechamber in the storage and retrieval operation room near the mid-term warehouse, and a pre-cooling cabinet and an anti-condensation cabinet are installed against the wall of the storage and retrieval operation room.

7. A double-layer crop germplasm resource bank according to claim 1, characterized in that: There is a power distribution room and a tool room in the low-temperature cold storage.

8. The double-layer crop germplasm resource bank according to claim 1, characterized in that: The top, bottom and circumference between the inner layer of the low-temperature cold storage and the outer layer of the low-temperature cold storage are sealed on site with flame-retardant PU material to block external hot and humid air.

9. The double-layer crop germplasm resource bank according to claim 1, characterized in that: The cold storage insulation door and the storage body insulation door are double-sided color steel polyurethane insulation doors; The entrances of the cold storage insulation door and the storage body insulation door adopt an insulation profile edge treatment structure to prevent the formation of cold bridges.

10. The double-layer crop germplasm resource bank according to claim 1, characterized in that: Aluminum alloy gusset plate ceiling is used inside the warehouse; The floor of the warehouse is provided with a thermal insulation board, the thermal insulation board is laid with staggered seams, a moisture-proof layer is arranged on the thermal insulation board, and the thermal insulation board is made of XPS extruded board with good flame retardancy, low thermal conductivity and low water absorption.

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